///*
// * Licensed to the Apache Software Foundation (ASF) under one or more
// * contributor license agreements.  See the NOTICE file distributed with
// * this work for additional information regarding copyright ownership.
// * The ASF licenses this file to You under the Apache License, Version 2.0
// * (the "License"); you may not use this file except in compliance with
// * the License.  You may obtain a copy of the License at
// *
// *     http://www.apache.org/licenses/LICENSE-2.0
// *
// * Unless required by applicable law or agreed to in writing, software
// * distributed under the License is distributed on an "AS IS" BASIS,
// * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// * See the License for the specific language governing permissions and
// * limitations under the License.
// */
//package org.apache.dubbo.rpc.protocol.dubbo.telnet;
//
//import org.apache.dubbo.common.extension.Activate;
//import org.slf4j.Level;
//import org.slf4j.LoggerFactory;
//import org.apache.dubbo.common.utils.StringUtils;
//import org.apache.dubbo.remoting.Channel;
//import org.apache.dubbo.remoting.telnet.TelnetHandler;
//import org.apache.dubbo.remoting.telnet.support.Help;
//
//import java.io.File;
//import java.io.FileInputStream;
//import java.nio.ByteBuffer;
//import java.nio.channels.FileChannel;
//import java.text.SimpleDateFormat;
//import java.util.Date;
//
///**
// * LogTelnetHandler
// */
//@Activate
//@Help(parameter = "level", summary = "Change log level or show log ", detail = "Change log level or show log")
//public class LogTelnetHandler implements TelnetHandler {
//
//    public static final String SERVICE_KEY = "telnet.log";
//
//    @Override
//    public String telnet(Channel channel, String message) {
//        long size = 0;
//        File file = LoggerFactory.getFile();
//        StringBuffer buf = new StringBuffer();
//        if (message == null || message.trim().length() == 0) {
//            buf.append("EXAMPLE: log error / log 100");
//        } else {
//            String[] str = message.split(" ");
//            if (!StringUtils.isInteger(str[0])) {
//                LoggerFactory.setLevel(Level.valueOf(message.toUpperCase()));
//            } else {
//                int showLogLength = Integer.parseInt(str[0]);
//
//                if (file != null && file.exists()) {
//                    try(FileInputStream fis = new FileInputStream(file)) {
//                        FileChannel filechannel = fis.getChannel();
//                        size = filechannel.size();
//                        ByteBuffer bb;
//                        if (size <= showLogLength) {
//                            bb = ByteBuffer.allocate((int) size);
//                            filechannel.read(bb, 0);
//                        } else {
//                            int pos = (int) (size - showLogLength);
//                            bb = ByteBuffer.allocate(showLogLength);
//                            filechannel.read(bb, pos);
//                        }
//                        bb.flip();
//                        String content = new String(bb.array()).replace("<", "&lt;")
//                                .replace(">", "&gt;").replace("\n", "<br/><br/>");
//                        buf.append("\r\ncontent:" + content);
//
//                        buf.append("\r\nmodified:" + (new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
//                                .format(new Date(file.lastModified()))));
//                        buf.append("\r\nsize:" + size + "\r\n");
//                    } catch (Exception e) {
//                        buf.append(e.getMessage());
//                    }
//                } else {
//                    size = 0;
//                    buf.append("\r\nMESSAGE: log file not exists or log appender is console .");
//                }
//            }
//        }
//        buf.append("\r\nCURRENT LOG LEVEL:" + LoggerFactory.getLevel())
//                .append("\r\nCURRENT LOG APPENDER:" + (file == null ? "console" : file.getAbsolutePath()));
//        return buf.toString();
//    }
//
//}
